New research offers an intriguing variation on the famous experiment, which proved light behaves as both a particle and a wave.
, the researchers made one big change: T
hey swapped out an ordinary screen with two slits for an indium-tin-oxide film—the same material that is used in modern phone screens. The researchers changed the reflectance of the screen using ultrafast lasers, which only allowed light through at specific times, quadrillionths of a second apart. Basically, they
built a quantum tollbooth, using the lasers to create time-dependent slits in the barrier. Even when they only allowed one photon through the screen, the light produced an interference pattern. Indium-tin-oxide is engineered to respond quickly to light, making it ideal for testing light’s behavior on ultrafast timescales.Advertisement
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